Here is how the L thing works! The 1971 cars (excluding the first few that were push-button cars) are just called Pantera. Part way through 1972 production the L Pantera (L for luxury) was introduced, mostly noticeable by the large heavy bumpers and the different single pod dash. The L changes were not all implemented completely starting with a particular serial number so there was a bit a mismatch for a few cars. A pre L is a reference to a 72 car before the L changes and does not relate to 71 cars because there were no L cars in 1971.